Update requirements.txt

requirements.txt

@@ -6,7 +6,7 @@
 # Python:  >= 3.10
 
 # ── Core UI ──────────────────────────────────
-gradio>=4.20.0
+gradio==5.20.1
 
 # ── Data & Numerics ──────────────────────────
 numpy>=1.24.0
@@ -23,7 +23,8 @@ requests>=2.31.0
 # ── RAG Chatbot (Tab A6) ─────────────────────
 sentence-transformers>=2.6.0
 faiss-cpu>=1.7.4
-torch>=2.0.0          # CPU-only is fine; sentence-transformers dependency
+torch==2.2.2+cpu --extra-index-url https://download.pytorch.org/whl/cpu
+
 
 # ── Optional: faster tokenization ────────────
 # tokenizers>=0.15.0  # installed automatically with sentence-transformers